Telephone-receiver.



No. 843,891. PATENTED FEB. 12, 1907. H. w. HAFF.

TELEPHONE RECEIVER. 7 APPLICATION FILED AUG. 27, 1906a wi t we so 0 efiwxa. Mm vw e k% I acousticon an sons.

UNITED STATES-,1 PATENT OFFICE.

HOWELL on. NEW YORK, N. Y., ASSIGNOR TO KELLEY ITURNER,

OF NEW YORK, N. Y.-

TELEPHONE-RECEIVER;

'Speciflcationof Letterlgatentl Pawnee-m.

Application and August 27,1906. seriaiu 'ssaoaa To all whom it mayconcern.-

Be it known that I, HOWELL W. HAFF, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certainjnewand useful Improvements in Telephone-Receivers,of which the following is a full, clear, and exact description.

. My invention relates to telephonic receivers, and (particularly thoseused with other apparatus for deaf per- The principal object of theinvention is to improve the mechanical features of construc- 'acterabove. mentione tion and particularly the switch mechanism b which thereceiver is thrown into and out" o 0 action. v

With this and othcrcbj'ect s in view the invention consists in thefeatures of construction hereinafter set forth and claimed;

f The'figure of the drawing illustrates areceiver embodying theprinciples of my invention.

current in telephonic a paratuso the charit is customa to have a. switchembodied the receiver,

which normally maintains-the battery-air uit 0 ned, but which is in aconvenient place, or engagement with the operatorsfin- -;:ger so thatthe circuit may be closed for 0 e'ration whenever desired. Inasmuch as te available, space within the receiver is limited, 'it' is a matter ofconsiderable difficultyto arrange this'switch to work positively andeffi- -ciently under all circumstances. In carrying out my invention Iaim to secure these purposes witha switch-of verymheap and simpleconstruction. 5

Referring to the drawing, 1 denotes the casing of a receiver having apermanent magnet 2 inset therein.

. 3 indicate the usual magnet-poles of soft iron, ca bobbins 4. v

The term nal wires of the bobbins are shown at .5 and 6; of'which 5'issoldered to a contact 10 and a tip-contact 11',

-collar-7 in alinement with a hole 8 in the casthe electricalconnectionwith the receiver employ an ordinary plug 9, havin a sleeveor therespective circuit-wires. The plug is adapted to be inserted through thebushed -h0l'e'8, so, that the tip-contact 1 1 enters the collar 7 andmakes electrical contact therewith. The

sleeve-contact 10 lies adjacent to the bushed hole 8 under thesecircumstances and falls in the path of the switch element above referredto. The switch element (designated at 12) is angularly at the ppint 1'3and pivotedv at 14 to the casing 1.

- y reason of the bent porconveniently madepf sheet metal bent righttion 13 the outer part of the switch element into s ring enga ement withthe sleeve-contact a ove descrr ed. When the switch element is'movedinto this relation, it is evident that theelect'ric circuit com lete.

for the receiver is at I claim is Y In a telephone instrumentQ'a collarconsti tuting' a fixed electrical terminal, a switch element alsoconstituting an electrical terminal and having means thereon whereby-itmay be moved to and fro b hand mani ulation, and a plug having atlp-contact a apted to enter said collar and having a sleeve-contactadapted to fall into the path of said switch element.

In witness whereof I subscribe my signature in the presence of twowitnesses. I

. HOWELL-W. HAFF.

- Witnesses:

ALFRED W. PROCTOR,

W M. SrooKBRmon.

